|
Chemical formula
|
SiO 2 |
|
Crystalline System
|
Trigonal |
|
Class
|
Oxides |
| Origin | Artigas, Uruguay |
| Size |
Medium: 3.00-4.00 cm Large: 4.00-5.00 cm |
Massive dark or black onyx.
Onyx is considered a variety of agate or chalcedony and can come in different colors such as green, red or white, with or without banding.
It is mainly used in jewelry and decorative items.
The piece you receive may differ slightly from the photo shown, since the minerals are natural and no pieces are identical. The size is approximate.